Research Article | Published:

Tests for Colour Defects

Nature volume 140, pages 414415 (04 September 1937) | Download Citation



DR. MARY COLLINS in her presidential address to Section J (Psychology) discusses some of the tests used in the diagnosis of colour defect. A brief reference is made to total colour-blindness and blue-yellow blindness, but they have neither the same theoretical nor practical importance of the third form of the defect, namely, red-green blindness. The incidence of this latter type in the male population is quoted in recent literature at figures ranging generally from 5 per cent to 12 per cent, as contrasted with the figures usually given of 3–4 per cent, her own results giving 7–5 per cent. It does not necessarily follow that the incidence of the defect is increasing, but the indications are that the detection of the defect is now more accurate owing to the improvement of test material.

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